How Public Health Threats Remain Secret

An October 2011 Salmonella outbreak has been connected with fast food giant Taco Bell. Diane Sawyer reports on how the sources of these outbreaks can remain secret.

Feb 9, 2012

An October 2011 Salmonella outbreak has been connected with fast food giant Taco Bell. Diane Sawyer reports on how the sources of these outbreaks can remain secret.

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